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【简答题】
三大生物活性物质主要是( )、 维生素 和 激素。
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皮皮学刷刷变学霸
举一反三
【单选题】When having dinner, the guests are expected to______.
A.
eat their food slowly
B.
help the host serve food
C.
serve each other at the table
D.
help themselves to more food
【单选题】Most of the guests ________ to the wedding last week were his classmates and friends.
A.
having been invited
B.
to be invited
C.
being invited
D.
invited
【简答题】汽车总体构造一般由(__)、底盘、车身及其附件、电气设备等四部分组成。
【判断题】若有如下程序段：int i;for (i=0;i<=20;i=i+3){printf("%d",i);}则其循环体的执行次数是6次。< /div>
A.
正确
B.
错误
【简答题】名词解释: 燃气热值;理论空气需要量;过剩空气系数;理论烟气量。
【单选题】Ann suggests that Mary offer drinks______.
A.
while the guests are having small talks
B.
when all the guests have arrived
C.
after the guests finish small talks
D.
after the dinner comes to an end
【简答题】汽车一般由( )、底盘、( )及电气设备等四部分构成。
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