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【单选题】
某同学使用计算器求30个数据的平均数时，错将其中一个数据105输入为15，那么由此求出的这组数据的平均数与实际平均数的差是 [ ]A.
3.5
B.
3
C.
0.5
D.
﹣3
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皮皮学刷刷变学霸
举一反三
【单选题】Things are hard with you, but you _______ try to get over the difficulties, for you have no choice. [ ]
A.
can
B.
may
C.
must
D.
ought to
【单选题】I know things are hard with you, but you( )try to get over the difficulties.
A.
can
B.
may
C.
must
D.
ought
【简答题】.'You try to get some sleep. I‘ll _____the patient."You try to get some sleep. I‘ll _____the patient‘s breakfast, "said the nurse. A)see to B)stick to C)get to D)lead to
【单选题】To appreciate that it's not easy for you, but you ______ try to get here on time．
A.
may
B.
must
C.
will
D.
can
【单选题】You never get ahead of anyone ______ you try to get even with him.
A.
as long as
B.
as well as
C.
as much as
D.
as far as
【简答题】If you try to learn too many things at a time, you may get (confuse) ______ .
【多选题】下列有关精细化工工艺学包含内容的说法中正确的是()。
A.
主要包含具体产品和单元反应两个方面的研究
B.
对具体产品而言，主要是研究最佳的合成路线和工艺路线
C.
对单元反应而言，主要是研究最佳工艺条件、合成技术和完成反应的方法。
D.
合成路线主要是对原料的预处理和反应物的后处理应采用的化工过程、设备及生产流程等方面进行研究。
E.
完成反应的方法主要是连续操作和间歇式操作的选择、反应器的选择和设计等方面的研究。
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