雨量仪器应保持仪器内外清洁,及时清除承雨器中的树叶、泥沙、昆虫等杂物,保持传感器、承雨器(),以防堵塞。
A、汇流失畅
B、汇流畅通
C、滴拉
D、断续通流
参考答案:B
化学是一门以实验为基础的科学,如图为初中化学中的两个实验.
(1)图2中标记a的仪器名称:______.
(2)图1实验中细沙的作用是______.
(3)图2实验中要用到氢气,在将氢气通入试管前,应事先______,试管中的化学反应方程式为:______.
根据句子意思,用所给单词的适当形式填空,将答案写在答卷上。(每小题1分)
小题1:Help (you) to some fish, kids.
小题2:We were (deep) moved by the story.
小题3:What is the (high) of this building?
小题4:Twenty-nine (innocence) people died because of the terrorist attacks(恐怖袭击)on March 1,2014 in Kunming.
小题5:After a long cold winter, the little bear appeared hungry and (healthy).
小题6:Do you feel much (good) now, Tom?
小题7:Would you mind (offer) your seat to the old?
小题8:I really don’t know how (solve) the problem.
小题9:It is blowing heavily outside. Please keep the door (close).
小题10:We must finish the project in two (week) time.