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【单选题】
下列说法中，正确的是（ ）A.
1molO的质量是32g/mol
B.
OH - 的摩尔质量是17g
C.
1molH 2 O的质量是18g/mol
D.
CO 2 的摩尔质量是44g/mol
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【单选题】The soldiers have to stand for hours without changing ________.
A.
position
B.
state
C.
situation
D.
condition
【单选题】Only when the war was over ____ return to his hometowns.
A.
have the soldiers
B.
the soldiers
C.
the soldiers did
D.
did the soldiers
【单选题】中外合资经营企业的合营期限，根据不同行业和项目的具体情况，由合营各方协商解决。一般项目的合营期限原则上为( )。
A.
5～10年
B.
10～20年
C.
10～30年
D.
15～30年
【单选题】It is not surprising that former soldiers have difficulty in ___________ civilian life.
A.
sticking to
B.
relating to
C.
adjusting to
D.
connecting to
【单选题】If you __________ Johnny Moder until recently, you'd think the photograph on the wall was strange.( )
A.
shouldn't contact
B.
didn't contact
C.
weren't to contact
D.
hadn't contacted
【单选题】He is the only one of the students who__________finished the task in time．
A.
is
B.
are
C.
have
D.
has
相关题目：
【单选题】中外合资经营企业的合营期限，根据不同行业和项目的具体情况，由合营各方协商解决。一般项目的合营期限原则上为( )。
A.
5～10年
B.
10～20年
C.
10～30年
D.
15～30年
参考解析：
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