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【单选题】
电化学分析法中，原电池是指A.
能将化学能转变为电能的化学电池
B.
能将电能转变为化学能的化学电池
C.
能自发地将化学能转变为电能的化学电池
D.
能自发地将电能转变为化学能的化学电池
E.
靠消耗外加电源电能才能诱发化学反应，即使电能转变为化学能的化学电池
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举一反三
【单选题】When the terrible flood happened in the south, the government ________ a state of emergency and general mobilization.
A.
stated
B.
declared
C.
advocated
D.
urged
【单选题】It can be inferred from paragraph 4 that medical personnel and other emergency workers
A.
are at risk for experiencing anxiety and depression
B.
are more likely than drivers to be deprived of sleep
C.
are not aware that they may suffer from sleep deprivation
D.
are rarely able to find jobs with daytime hours
【单选题】When giving the orders, the captain() stress on emergency of the work.
A.
give
B.
get
C.
lay
D.
laid
【单选题】This is a very difficult operation. It is essential that you __________ for emergency.
A.
are to be prepared
B.
would prepared
C.
be prepared
D.
must be prepared
【单选题】When the audience heard the alarm, they all hurried to ____ they thought was an emergency exit door. [ ]
A.
what
B.
which
C.
where
D.
who
【简答题】若已定义 int m=7;float k=5.5; 则表达式 k+ m%2/4 的值为__________。
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