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【单选题】
The big secret in life is that there is no big secret. __________ your goal, you can get there if you’re willing to work.
A.
However
B.
Whichever
C.
Wherever
D.
Whatever
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参考答案:
举一反三
【简答题】It’s just a small, white envelope stuck among the branches of our Christmas tree. No name, no address. It has peeked through the branches of our tree for the past 10 years. It all began because my hus...
【单选题】It’s just a petty mistake.
A.
maior
B.
important
C.
serious
D.
minor
【简答题】标签 ( ) 表示它所包围的内容是无序列表标签 , 而 ( ) 表示有序标签。
【简答题】Why did humans evolve to walk upright? Perhaps because it’s just plain easier. Make that “energetically less costly”, scientifically speaking. Bipedalism—walking on two feet, is one of the defining ch...
【简答题】判断下列曲面的类型,并说明是否为旋转曲面: (1)x 2 +2y 2 =z 2 -3;    (2)x-2y 2 +2z 2 =0; (3)2x 2 -3y 2 =3z 2 -1;    (4)x 2 +5y 2 =1-z 2 ; (5)2-x 2 =z 2 -y。
【单选题】曲面x2+2y2+3z2=6,在点(1,1,1)处的法线方程为( )。
A.
x-1=y-1=z-1
B.
C.
D.
x+1=y+1=z+1
【单选题】It’s me why some people are crazy about iPhone. It’s just a means of communication.
A.
above
B.
under
C.
beyond
D.
over
【多选题】植物化学保护学是研究科学地应用农药来防治()、线虫、鼠类等有害生物,保护农、林业生产的一门科学
A.
害虫
B.
害螨
C.
病原菌
D.
杂草
【判断题】蛋糕的全蛋搅拌法是将糖与全蛋液一起搅打,制体积增大3倍左右,加入过筛面粉成面糊的工艺方法。
A.
正确
B.
错误
【单选题】旋转曲面3x2+3y2-z2=1的转轴与母线分别为( )
A.
x轴;xoy面上曲线3x²+3y²=1
B.
y轴;yoz面上曲线3y²-z²=1
C.
z轴;xoy面上曲线3x²+3y²=1
D.
z轴;xoz面上曲线3x²-z²=1
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