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【简答题】
用亨利系数 E 表达的亨利定律表为 _______ 。在常压下(近似为 760mmHg ), 20 °C 时, 氨在空气中的分压为 50mmHg ,与之平衡的氨水中的氨的摩尔分率 x 为 0.0735 ,此时亨利系数 E=_______ mmHg 。
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【单选题】哺乳动物的牙齿为异型齿,分为4种类型,下列哪一种不属于
A.
柱齿
B.
犬齿
C.
门齿
D.
臼齿
【单选题】假定8组LED接到单片机的P1口,如果仅仅P1.1口上的灯亮,其余的灭,应该给P1口的值为:
A.
0xFE
B.
0xFD
C.
0xAF
D.
0xDF
【多选题】下列属于槽生牙特点的有
A.
有神经从根尖孔进入髓腔
B.
固定在颌骨内
C.
哺乳类动物包括人类长有这类牙
D.
有血管从根尖孔进入髓腔
E.
有完善的牙根
【单选题】听力原文:W: Would you like w have acme coffee for a break? M: Could you wait for a while? I'm trying to finish the notes before the discussion. (14)
A.
He will drink coffee after the discussion.
B.
He will have coffee later.
C.
He will drink the coffee before the discussion.
D.
He will wait for his turn to get the coffee.
【单选题】下列哪一项能完全适用于描述哺乳类动物()。
A.
哺乳动物都有毛,是表皮角质化的产物
B.
哺乳类都是胎生的和哺乳的
C.
所有哺乳类的身体都可以分为头、颈、躯干、尾和四肢五部分
D.
哺乳动物均具有牙齿,且均为异型齿
【单选题】听力原文:W: Oh, no! Where are my car keys? M: Relax, Kate. Are they in your purse? W: No, they're not. They're gone! M: I bet they're still on the table in the restaurant. Where does the man think the key...
A.
In the woman's car.
B.
In the restaurant.
C.
In the woman's house.
【单选题】听力原文:W: Masonic Anditorium. Can I help you? M: Is there a concert on Friday? W: Yeah, that's right. Jefferson Starship. M: And how much are the seats? W: Five and seven-fifty. M: And what time does it...
A.
He is inviting the woman.
B.
He is consulting a friend.
C.
He is asking information about a concert.
D.
He is buying something.
【多选题】关于职务发明权属的相关说法,正确的有:( )。
A.
职务发明是主要是利用本单位的物质技术条件所完成的发明创造
B.
职务发明创造申请专利的权利属于该单位
C.
单位与发明人有合同约定,应遵守约定
D.
发明人有获得物质奖励和精神奖励的权利
【多选题】关于职务发明权属的相关说法,正确的有()。
A.
职务发明是主要是利用发明单位的物质技术条件所完成的发明创造
B.
职务发明创造申请专利的权利属于发明单位
C.
单位与发明人有合同约定,应遵守约定
D.
发明人有获得物质奖励和精神奖励的权利
【单选题】All of the following conditions promote the denaturation of DNA except
A.
low ionic strength solutions.
B.
high pH.
C.
organic solvents.
D.
high temperature.
E.
extremely low temperature.
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