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【判断题】
牛腿柱的最后固定，要求在柱子与杯口的空隙分两次浇筑细石混凝土，当第一次浇筑的细石混凝土强度达到设计强度等级的30%时才可以浇筑第二次混凝土。( )A.
正确
B.
错误
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举一反三
【单选题】Mr. White has two sons, and each of them has a sister. How many children does he have?
A.
one
B.
two
C.
three
D.
four
【单选题】He has two sons. They are Jim and Tom. Jim is Tom’s brother.
A.
old
B.
older
C.
elder
D.
young
【单选题】2 He has two sons, and _____ are college students.
A.
both of which
B.
both of whom
C.
both of them
D.
both of it
【单选题】Mr. White has two sons and each of them has a sister .how many children does he have ?
A.
one
B.
two
C.
three
D.
four
【单选题】Block group contains .
A.
connecting rods, crankshaft and flywheel
B.
pistons, connecting rods and oil pan
C.
cylinder block, cylinder head and oil pan
D.
piston rings, gasket and connecting rods
【单选题】He has two sons, and _____ are college students.
A.
both of which
B.
both of whom
C.
both of them
D.
both of it
【单选题】Block group contains______.
A.
connecting rod, crankshaft and flywheel
B.
pistons, connecting rods and oil pan
C.
cylinder block, cylinder head and oil pan
D.
piston rings, gasket and connecting rods
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