根据我国年降水量的地区分布规律，以下城市中，降水最多的应该是[ ]
A．台北
B．武汉
C．兰州
D．酒泉
答案：A
A Sichuan government official expressed their thanks through CCTV for the aid they ______ in the last three years.
A．would receive
B．are receiving
C．have received
D．had received
用催化加氢法测双键时，试样、溶剂中不得含有（）等能毒害催化剂的杂质。
A.硫化物
B.一氧化碳
C.硫化物和一氧化碳
D.氧气和氯化氢
