【简答题】已知H2SO4质量分数为96%,相对密度为1.84,欲配制0.5L0.10mol/LH2SO4溶液,试计算需要多少毫升H2SO4?
【简答题】听一听,选出正确答案。 ( ) 1. A. Yes. ( ) 2. A. Yes. ( ) 3. A. Yes. ( ) 4. A. Yes. B. No. B. No. B. No. B. No.
【简答题】听下面一段对话,回答第1-3小题。 ( )1. A. No. 26 Middle School's. ( )2. A. Jim. ( )3. A. 2-1 B. No. Middle School's. B. Tom. B. 2-0 C. No. 62 Middle School's. C. Sam. C. 3-2
【单选题】以下叙述错误的是______。
B.
GIF格式图像可形成动画效果,因而在网页制作中大量使用
C.
图像数据压缩,不论是有损压缩,还是无损压缩,重建的图像与原始图像总有一定误差
D.
动画是一种通过连续画面来显示运动和变化的技术
【简答题】看图片,选出正确的单词或短语。 ( ) 1. A. traffic rules B. traffic lights ( ) 2. A. No. 14 bus B. No. 40 bus ( ) 3. A. by train B. by subway ( ) 4. A. by bike B. by ship
【简答题】Listen and choose the answers. 听录音,选出正确答案。 ( ) 1. A. Yes. B. No. ( ) 2. A. Yes. B. No. ( ) 3. A. Yes. B. No. ( ) 4. A. Yes. B. No. ( ) 5. A. Yes. B. No. ( ) 6. A. Yes. B. No.
【单选题】线路两旁堆放的货物,距钢轨头部外例小于( )时,不准调车。
【简答题】根据图意完成句子。 1. — Are these her shorts? — — Are these shorts too big? — 2. — — No. This hat is too small. 3. — — They are blue and white. — The are .(刚好)
【简答题】听下面一段材料,回答第1-2题。 1. Which bus will the man probably take? A. No. 9. B. No.10. C. No. 15. 2. How often does No. 10 bus come? A. Every 30 minutes. B. Every 15 minutes. C. Every 10 minutes.
【简答题】已知H 2 SO 4 质量分数为96%,相对密度为1.84,欲配制0.50L 0.10mol/LH 2 SO 4 溶液,试计算需浓H 2 SO 4 多少毫升?