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听力原文: Tom Johnson came to a hotel. He wanted to stay in a single room with bath. He made the reservation at the airport. After he arrived and checked in at the hotel, he filled out a registration card and got the key to his room. His room number was 235. Breakfast was included in the bill, which was served for several hours in the morning. Tom would pay for the hotel cost when he checked out. The receptionist hoped that he would enjoy himself during his stay there. Tom Johnson came to a【11】. He wanted to stay in a single room with bath. He made the reservation at the【12】. After he arrived and checked in at the hotel, he filled out a registration card and got the key to his room. His room number was 235. Breakfast was included in the【13】, which was served for several hours in the morning. Tom would【14】for the hotel cost when he checked out. The receptionist hoped that he would【15】himself during his stay there.
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【单选题】在液相色谱中,紫外检测器的灵敏度可达到()g。
A.
10-6
B.
10-8
C.
10-10
D.
10-12
【单选题】关于牙周健康,我国现状的一些主要特点不包括( )
A.
重视口腔卫生
B.
不重视口腔卫生
C.
早期无症状不疼痛——晚期就诊很严重
D.
存在关于我国老年人缺牙率非常高的现象为正常现象的误区
【单选题】滚动轴承转动时滚动体和滚道受 。
A.
、按对称循环变化的接触应力
B.
、按脉动循环变化的接触应力
C.
、按对称循环变化的弯曲应力
D.
、按脉动循环变化的弯曲应力
【单选题】轴承转动时,滚动体和滚道受 。
A.
按对称循环变化的接触应力
B.
按脉动循环变化的接触应力
C.
按对称循环变化的弯曲应力
D.
按脉动循环变化的弯曲应力
【单选题】轴承转动时,滚动体和滚道受________。
A.
按对称循环变化的接触应力
B.
按脉动循环变化的弯曲应力
C.
按对称循环变化的弯曲应力
D.
按脉动循环变化的接触应力
【单选题】在液相色谱中,紫外检测器的灵敏度可达到( )g。
A.
10-⁶
B.
10-9
C.
10-¹⁰
D.
10-¹²
【单选题】在液相色谱中,紫外检测器的灵敏度可达到()g。
A.
10-6
B.
10-9
C.
10-10
D.
10-12
【单选题】在液相色谱中,紫外检测器的灵敏度可达到()克
A.
10 -6
B.
10 -9
C.
10 -12
D.
10 -10
E.
10 -3
【单选题】在液相色谱中,紫外检测器的灵敏度可达到()g。
A.
10-6
B.
10-9
C.
10-12
D.
10-10
【判断题】在大部分公开网站使用FTP上传或下载文件时,可使用匿名登录,用户名是anonymous,密码可以任意输入。
A.
正确
B.
错误
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