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【单选题】
可用于标定盐酸溶液的基准物质是A.
H2C2O4
B.
ZnO
C.
As2O3
D.
Na2CO3
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】听力原文：W: I'd like you to go to the exhibition with me this evening M: I'm exhausted. You must manage it without me tonight. Q: What does the man mean? (16)
A.
He will go to the exhibition with her.
B.
She'd better not go to exhibition without him.
C.
He can not go with her for the exhibition.
D.
She must know how to do with the exhibition.
【单选题】听力原文：W: Oh, Jackie, I've had such a terrible day. M: You look exhausted. What on earth have you been doing? W: Oh, I've been such a fool! You just wouldn't believe what I've done. M: I would, I would....
A.
In central London.
B.
Near a police station.
C.
By the tube station.
D.
On a side street.
【单选题】下行沟通是指
A.
组织中的上层领导按指挥系统从上而下的情报沟通
B.
下级的意见、信息向上级反映
C.
下级之间的意见交流
D.
通过上级组织明文规定的渠道进行信息传递
【单选题】下列关于网络工作模式的说法中,错误的是
A.
一台计算机到底是服务器，还是客户机，取决于该计算机安装和运行什么软件
B.
若采用对等模式，网络中每台计算机既可以作为工作站也可以作为服务器
C.
在C/S模式中，网络中每台计算机要么是服务器，要么是客户机
D.
充当服务器角色的大多数设备是便携式计算机或个人电脑
【单选题】听力原文：W: I'm exhausted. It took me about three hours just to buy a few things. M: What did you buy? W: I bought a dozen cassettes. M: How much did they cost you? W: I bought them on sale. They were $ 2...
A.
$ 20.
B.
$ 22.
C.
$ 20.80.
D.
$ 21.20.
【多选题】中国古代上自天子王侯的都城,下至州郡府县的治所,都有城墙围绕。城墙上有( )等防御工事,构成一整套坚固的防御体系。 2019 省赛
A.
城楼
B.
角楼
C.
垛口
D.
射台
【简答题】I was so exhausted by________________(我所经历的一切) that my nerves almost broke.
【多选题】中国古代上自天子王侯的都城,下至州郡府县的治所,都有城墙围绕。城墙上有( )等防御工事,构成一整套坚固的防御体系。
A.
城楼
B.
角楼
C.
垛口
D.
射台
E.
门楼
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