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问题
填空题
台地碳酸盐岩潮垃相可分为（）两种亚相。
答案
参考答案：潮上带和潮间带
判断题
看图，读句子并判断。正确的画“√”，错误的画“×”。
( ) 1.
He goes to school by bus.
( ) 2.
They are having supper now.
( ) 3.
They are at the bus stop.
( ) 4.
— What's the weather like? — It's rainy.
查看答案
单项选择题
压力对工作的影响是：（）
（1）不想工作
（2）工作表现不稳定
（3）注意力不集中
（4）不正常个人表现
A.以上都是
B.以上都不是
查看答案
He goes to school by bus.
They are having supper now.
They are at the bus stop. 
— What's the weather like? — It's rainy.