关于抗-HAV-IgG，下述哪些项论述正确() A.可作为早期诊断标志 B.是中和抗

阅读下面短文，用括号内所给动词的适当形式填空。(必要时可加情态动词或助动词)

     Victor used to be such a good runner that he (1) _______(win)nine awards at the age of 18.Then one day while he (2) _______(run)along the roadside, an accident suddenly happened to him. Unfortunately

both of his legs (3) _______ (injure)seriously by a car out of control. Since then, he (4) _______ (not be)able to walk any more.

     After a long time, however, he knew life (5)_______(not stop)for him. He focused on what he could

do instead of what he lost. He realized that there were many possibilities for the disabled. One of the things he became interested in was foreign languages.

      Every day he listened to tapes and read books. After several years he became fluent in three languages. Then he (6) _______(try)his best to work as a translator in a company. To everybody's surprise, he

became the best one in the city.

      Though Victor wishes he could walk, he is always looking forward to (7) _______(live)a wonderful

life in the future. Sometimes he (8) _______(miss)being able to walk or run. But now at least he can live

on his own and make himself (9) _______(enjoy)what he likes. He thinks there's much (10) _______(be)

thankful for.

下列运算正确的是[ ]

A．a²+a³=a⁵

B．a²·a³=a⁵

C．（a²）³=a⁵

D．a¹⁰÷a²=a⁵

设随机变量X服从正态分布

Y服从正态分布

且P|X-μ₁|＜1>P|Y-μ₂|＜1，则必有

2011“福满星城”购物消费节于哪一年哪一月开始？

万吨、8～9万吨、20～30万吨船靠栈桥时入泊速度应控制于：（）.

A.＜25cm/s；＜15cm/s；10～15cm/s的范围

B.＜10cm/s；2～8cm/s；1～5cm/s的范围

C.＜5cm/s；＜3cm/s；＜2cm/s的范围

D.＜20cm/s；＜15cm/s；＜10cm/s的范围