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【单选题】
原发性肝癌早期最常见的表现是A.
发热
B.
黄疸
C.
肝大
D.
肝区疼痛
E.
食欲减退
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【简答题】Complete each sentence with the appropriate form of the correct word from each pair. 1. beneath/below a. Can you see those trees a few metres _____1______ the top of the hill? b. The boat crashed into...
【简答题】成瘾性在医学上也称为药物依赖或药瘾,是指由于反复使用某种药物而对该种药物产生的躯体或( )依赖。
【单选题】--- Excuse me, officer. I can't find the subway entrance. ______ - -- See those glass doors? Go in and you will see it on your right. A. Can you help me? B. Where is it?
A.
Can you help me?
B.
Where is it?
【简答题】（1）如图，已知点C在线段AB上，且AC=6cm，BC=4cm，点M、N分别是AC、BC的中点，求线段MN的长度； （2）若点C是线段AB上任意一点，且AC=a，BC=b，点M、N分别是AC、BC的中点，请直接写出线段MN的长度；（用a、b的代数式表示） （3）在（2）中，把点C是线段AB上任意一点改为：点C是直线AB上任意一点，其他条件不变，则线段MN的长度会变化吗？若有变化，求出结果．
【单选题】听力原文：M: Can you work for me tomorrow from 1:30 p. m. to 5:00 p. m.? You see, I have a meeting and I need someone to fill in those hours for me. W: I don't know if I can. I have an appointment tomorrow...
A.
He has to fill in for someone.
B.
He has an appointment.
C.
He has a meeting.
D.
He doesn't give a reason.
【简答题】请简要概述正确使用安全套的六步骤。
【简答题】8-2 3 ÷（-4）×（-7+5）+0÷2 11 ×（-3 2 ）．
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