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【简答题】
My partents are both busy with their work,______ they don't have much time to talk with me. A. since B. because C. but D. so
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举一反三
【单选题】普通圆柱蜗杆传动的正确啮合条件是( )。
A.
：下标t表示端面，a表示轴向，1表示蜗杆、2表示蜗轮）
B.
mt1=ma2, αt1=αa2,γ=β
C.
ma1=mt2, αa1=αt2,γ=β
D.
mt1=ma2, αt1=αa2,γ=-β
E.
ma1=ma2, αa1=αt2,γ=-β
【单选题】---Who would you rather ________ the English Speech Contest? ---- Li Ping, I think , is the best choice.
A.
have attend
B.
attend
C.
have attended
D.
attending
【单选题】. –Tom, go to the office to fetch the papers. Who would you rather with you, Wang Lin or Li Feng? --- .
A.
have go; Neither
B.
go; Neither
C.
have gone; None
D.
have to go; None
【单选题】There is a leadership opportunity at NC State that really interests you. You would like to apply for the opportunity, but are nervous about the public speaking duties that may be necessary. What shoul...
A.
Avoid all positions and opportunities that involve public speaking.
B.
Do not apply for the position. Public speakers are born, not made.
C.
Apply for the position. Public speakers are made, not born.
D.
Apply for the position but skip any public speaking duties that become necessary.
【单选题】普通圆柱蜗杆传动的正确啮合条件是 ( ) 。
A.
mt1=mx2 ，α t1= α x2 ，γ = β
B.
mx1=mt2 ，α x1= α t2 ，γ =- β
C.
mt1=mx2 ，α t1= α x2 ，γ = - β
D.
mx1=mt2 ，α x1= α t2 ，γ = β
【单选题】---__________ take out the trash after dinner? ---Yes, sure.
A.
How about
B.
Would you mind
C.
Would you like
D.
Could you please
【单选题】普通圆柱蜗杆传动的正确啮合条件是 ( )。
A.
mt1=ma2, αt1=αa2,γ=β
B.
ma1=mt2, αa1=αt2,γ=β
C.
mt1=ma2, αt1=αa2,γ=-β
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