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【单选题】
— Would you like to tell me about travel? — OK. I really experienced ____. [ ]A.
interesting something
B.
something interesting
C.
anything interesting
D.
nothing interesting
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【简答题】如题8.10图所示连续系统的框图，已知系统的初始状态x 1 (0 - )=2，x 2 (0 - )=1，输入f(t)为因果信号。试写出描述该系统的微分方程，并求出此微分方程的初始条件y(0 - )和y'(0 - )。
【单选题】It is often （ ）that human beings are naturally equipped to speak.
A.
said
B.
to say
C.
saying
D.
being said
【简答题】听短文,判断句子正'T'F'(听两遍) ( )1.It doesn't often snow in winter in.England. ( )2.It's cold in the morrung in summer. ( )3.It often rains in spring. ( )4.In autumn it is cool, ( )5. The weather often cha...
【单选题】关于投标保证金的有关解释正确的是( )。
A.
投标保证金数额一般为投标报价的10%左右
B.
投标保证金数额最高不得超过80万人民币
C.
投标保证金有效期应超出投标有效期30天
D.
如果投标报价最低，不提交投标保证金也可不作为废标
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