Americans _____ millions of Christmas cards every year.A. changeB. exchangeC. attemptD. determine

A.putPoker.jarindirectory/stuff/java，andsettheCLASSPATHtoinclude/stuff/java

B.putPoker.jarindirectory/stuff/java，andsettheCLASSPATHtoinclude/stuff/java/*.jar

C.putPoker.jarindirectory/stuff/java，andsettheCLASSPATHtoinclude/stuff/java/Poker.jar

D.putPoker.jarindirectory/stuff/java/games/cards，andsettheCLASSPATHtoinclude/stuff/java

Each life jacket light that has a non-replaceable power source must be replaced ______．

A.every 6 months after initial installation

B.every 12 months after initial installation

C.every 24 months after initial installation

D.on or before the expiration date of the power source

A. Every 5 minutes

B. Every 90 seconds

C. Every 60 seconds

D. Every 30 seconds

材料：

When expenses are incurred the liability under this insurance shall not exceed the proportion of such expenses that the amount insured hereunder bears to the value of the Vessel as stated herein，or to the sound value of the Vessel at the time of the occurrence giving rise to the expenditure if the sound value exceeds that value．Where the Underwriters have admitted a claim for total loss and property insured by this insurance is saved，the foregoing provisions shall not apply unless the expenses of suing and labouring exceed the value of such property saved and then shall apply only to the amount of the expenses which is in excess of such value．

When a claim for total loss of the Vessel is admitted under this insurance and expenses have been reasonably incurred in saving or attempting to save the Vessel and other property and there are no proceeds，or the expenses exceed the proceeds，then this insurance shall bear its pro rata share of such proportion of the expenses，or of the expenses in excess of the proceeds，as the case may be，as may reasonably be regarded as having been incurred in respect of the Vessel，but if the Vessel be insured for less than its sound value at the time of the occurrence giving rise to the expenditure，the amount recoverable under this clause shall be reduced in proportion to the under-insurance．

问题：

Of the following，_______ only is correct．

A.The stated value of the vessel is always higher than its ensured value

B.The sound value of the vessel at the time of the occurrence is always higher than its ensured value

C.The sound value of the vessel at the time of the occurrence is always higher than its stated value

D.The sound value of the vessel at the time of the occurrence is always higher than its saved value

Assuming the sound value of the vessel at the time of accident is $10 millions，the insured value $9 millions，the stated value $8 millions，the expense incurred $2 millions，the liability under this insurance is likely to be _______．A.$2.0 millions

B.$1.8 millions

C.$1.6 millions

D.$1.4 millions

Under afore-said conditions，assuming the expense of suing and labouring is $3 millions，the proceeds $2 million，and the Underwriter has admitted a claim for total loss，the liability under this insurance is likely to be _______．A.$0.9 million

B.$0.8 million

C.$1.0 million

D.$2.0 millions

Under previous conditions，assuming the saved value is $1 million，the expense of suing and labouring $3 millions，and the Underwriter has admitted a claim for total loss，the liability under this insurance is likely to be _______．A.$2.0 millions

B.$1.8 millions

C.$1.6 millions

D.$1.4 millions

请帮忙给出每个问题的正确答案和分析，谢谢！