在离地面高度等于地球半径的地方,重力加速度的大小是地球表面处的 [ ]
A.2倍
B.1倍
C.倍
D.倍
答案:D
收集资料的方法有统计报表、日常性工作和( )。
A.计量资料
B.专题调查
C.计数资料
D.综合资料
根据下列句子及所给汉语注释,在空缺处写出各单词的正确形式(每空一词)。
小题1:If you are ill, you should take some ____________ (药) and have a good rest.
小题2: They’re ____________ (计划) to go to Beijing next weekend.
小题3:The 2013 New Year’s Concert is going to be a ____________ (创新的) show.
小题4:I ____________ (写) her some letters, but she didn't write to me.
小题5: I’m going to eat (更少的) food.