水平岩层在地面及地质图上的特征是：露头宽度及露头形状主要与（）有关。
A、地形特征
B、岩层的厚度
C、岩层的产状
D、岩层的倾角
参考答案：A
烧水的铝壶用久了，往往在壶内积起一层水垢，这时可在壶里放进一小匙什么东西略煮几分钟，即可去垢？（）
A、醋
B、苏打
C、盐
---I hear Huang Gang made an English speech at his graduation ceremony yesterday.
--- ________, and ________.
A．So he did, so did I
B．So did he, so I did
C．So he was, so was I
D．So was he, so I was
