问题
选择题
下图是粗盐提纯实验的部分操作，其中操作错误的是（ ）
A．
取一定量粗盐
B．
溶解
C．
过滤
D．
蒸发
答案
答案：C
搜题请搜索小程序“爱下问搜题”
下图是粗盐提纯实验的部分操作，其中操作错误的是（ ）
A．
取一定量粗盐
B．
溶解
C．
过滤
D．
蒸发
答案：C
| 完形填空。 | |||
| Bob and Mike are in the same school, 1 they are in diffrent classes. Their favorite 2 is Chinese. They 3 Chinese is very interesting. They go to school on weekdays. They come to school 4 7:00 in the morning. Today is Tuesday. Bob and Mike are in theirown(自己的)classroom. Bob 5 an English class. Look ! He is talking 6 his English teacher in English. Mike is having a Chinese class. His teacher is talking 7 Beijing Opera with them.The students are looking at their teachers. They 8 (认真地). But one of Bob’s classmates 9 a story book , because he isn't good at English and he 10 English. | |||
| ( )1. A. but ( )2. A. sport ( )3. A. say ( )4. A. in ( )5. A. have ( )6. A. at ( )7. A. to ( )8. A. listen to ( )9. A. are reading ( )10. A. likes | B. and B. language B. speak B. on B. had B. to B. in B. listening to B. is reading B. doesn't like | C. or C. country C. tell C. at C. has C. for C. about C. are listening C. is read C. isn't like | D. because D. subject D. talk D. about D. is having D. of D. at D. are 1istening to D. reads D. isn't liking |