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【单选题】
My sister asks to go to school with her.A.
I
B.
me
C.
my
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举一反三
【单选题】He was so tired that as soon as he lay down he fell _______ asleep.
A.
fast
B.
very
C.
much
D.
Deep
【简答题】利用得失电子守恒,配平下列方程式。 KMnO 4+ + HCl = KCl + MnCl 2+ + Cl 2 ↑+ H 2 O
【单选题】He was so deep in thought，thinking of the problem ________ he knocked into the tree without noticing it.
A.
when
B.
while
C.
because
D.
that
【单选题】Before reassembling any machinery, you should _____.
A.
replace all bearings regardless of length of service
B.
apply a heavy coat of oil to all mating surfaces
C.
clean any corroded surfaces and file all burrs smooth
D.
coat all parts with alemite grease
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