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【单选题】
外科学与内科学的范畴是A.
完全不同的
B.
相对的
C.
偶尔相同的
D.
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【简答题】填入所缺单词完成句子。 Many years ago people didn't travel by ______________. They didn't travel by ______________. They didn't travel by ______________.
【单选题】The man didn‘t get the job because he__ 查看材料
A.
disliked such a job
B.
didn't pass the test
C.
didn't have an e-mail
D.
knew nothing about computers
【多选题】在室内遇到地震发生时,导游应指导游客( )。
A.
不要逃出后又返回房中取财物
B.
迅速进电梯,撤至室外
C.
不在楼道躲避
D.
应就地躲避,躲在桌、床等结实的家具下
E.
尽量躲在窄小的空间内,如卫生间、厨房或内墙角
【简答题】在一定的条件下煤样与周围空气湿度达到平衡时失去的水分，称为[ ]A. 外在水分
【简答题】Thousands of years ago, people didn’t live in cold places because they didn’t know how to keep themselves warm. Later they learned to make clothes. When an animal was killed, they made use of its skin...
【简答题】Thousands of years ago, people didn't live in cold places because they didn't know how to keep themselves warm. Later they learned to make clothes. When an animal was killed, they made use of its skin...
【简答题】（）是指煤放置在大气中使水分不断蒸发，当煤中水的蒸气压与大气中水蒸气分压达到平衡时，煤中水分不再变化。这时所失去的水分占煤样质量的百分数就是外在水分，用M f 表示。而残留在煤内部孔隙中没有蒸发出来的水分称为内在水分，用M inh 表示。全水分，用M t 或M ar 表示。
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