问题
选择题
We are invited to a party __________in our club next Friday.
A．to be held
B．held
C．being held
D．holding
答案
答案：A
本题考查非谓语动词。由next month可知时间是在将来，party是被举行，故选A。
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We are invited to a party __________in our club next Friday.
A．to be held
B．held
C．being held
D．holding
答案：A
本题考查非谓语动词。由next month可知时间是在将来，party是被举行，故选A。
其满足的切比雪夫不等式为
≤______。