问题
单项选择题
沉淀法含砂仪的量筒上部容积为（）mL。
A、500
B、450
C、400
D、350
答案
参考答案：B
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沉淀法含砂仪的量筒上部容积为（）mL。
A、500
B、450
C、400
D、350
参考答案：B
| 从方框中选择适当的句子补全对话。 | |
B: Charles Smith. He holds the world record for hiccupping. He hicupped for 69 years and 5 months. A: 1 B: He started hiccupping in 1992. A: 2 B: He stopped in 1990. A: 3 B: I don't know. Oh, look, this is Donna Green. A: 4 B: Sneezing. She sneezed for 978 days. A: 5 B: Let's see. It says she started sneezing on January 13th, 1981, and she sneezed until September 16th, 1983. A: Wow! That's a long time. 1._____2._____3._____4._____5._____ |