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【简答题】
How damaging was the storm?It caused four deaths and serious damage including a ______.
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举一反三
【单选题】下列反应的平衡常数 ：C(s)+O 2 (g)====CO 2 (g)为 ，2CO(s)+O 2 (g)====2CO 2 (g)为 ，C(s)+(1/2)O 2 (g)=CO(g)为 ，则三个平衡常数之间的关系为( )。
A.
B.
C.
【单选题】（理）若随机变量的分布列如下表，则Eξ的值为（ ） ξ? 0 1 2 3 4 5 P 2x 3x 7x 2x 3x x
A.
1 18
B.
1 9
C.
20 9
D.
9 20
【单选题】Why does the woman's initial excitement turn to disappointment?
A.
She is told that all swimming classes are full.
B.
She learns that she will have to pay extra for classes.
C.
She finds out that there are no swimming classes at her level.
D.
She thought all sports activities were supervised by coaches.
【单选题】Why does the student go to the woman's office?
A.
To schedule an audition to join an archestra
B.
To ask a question about a music class he is taking
C.
To get information for an article he is writing
D.
To ask a question about a lecture the woman gave
【单选题】船长下达弃船的命令后______应按______完成各自的弃船准备工作
A.
轮机长/船长指令
B.
轮机长/船长指令
C.
全体船员/船长指令
D.
全体船员/应急部署
【单选题】Why does the man need the woman's help?
A.
Because he fell down into the deep bunker.
B.
Because he can't get the ball out of the deep bunker.
C.
Because he can't find his ball.
D.
Because he can't find his sand wedge.
【单选题】若随机变量X的分布列如下表，则E（X）=（ ） X 0 1 2 3 4 5 P 2x 3x 7x 2x 3x x
A.
1 18
B.
1 9
C.
9 20
D.
20 9
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