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【多选题】
苦杏仁与紫苏子均有的功效是A.
止咳平喘
B.
降气化痰
C.
纳气平喘
D.
润肺止咳
E.
润肠通便
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反馈参考答案：
举一反三
【单选题】Some brake systems have disc brakes at all four wheels, some have______ at the front and drum brakes at the rear, others have drum brakes at all four wheels.
A.
disc brakes
B.
drum brakes
C.
calipers
D.
discs
【单选题】某原油密度 =0.9017 ,特性因数 K=11.2 ,含硫量为 0.91 ,该原油属于( )。
A.
含硫中间基，重质原油
B.
含硫中间基，中质原油
C.
低硫石蜡基，中质原油
【简答题】钳式制动器的制动间隙是如何调整的?
【单选题】________ is the greatest advantage of disk brakes, compared to drum type braking system.
A.
Simpler design
B.
Lighter weight
C.
Better Braking Performance
D.
Better resistance to “brake fade”
【单选题】He got injured because of his faulty brakes. He ________to see if his brakes were working properly.
A.
must check
B.
should check
C.
must have checked
D.
should have checked
【单选题】__________disk brakes have either two or four pistons.
A.
brake caliper
B.
floating-caliper
C.
fixed-caliper
D.
sliding-caliper
【多选题】Brakes may be classified into
A.
friction brakes
B.
electric brakes
C.
magnetic brakes
D.
fluid brakes
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