wear off
wear out
wear over
wear in
第1题:
Brides usually wear white wedding dresses,because white______ purity.
A.stands for
B.stands out
C.stands up
D.stands by
第2题:
第3题:
第4题:
The sailor working aloft should wear ().
第5题:
braids
brains
bribes
brides
第6题:
helmet
slippers
goggles
immersion suits
第7题:
Jade and Jenny are tall and have long hair.
Jenny and Jessica have short hair and are tall.
Jessica and Nicky wear spectacles and have short hair.
Jessica and Jenny have short hair and wear spectacles.
第8题:
persons in the space wear gas masks
persons in the space wear damp cloths over their mouths and nostrils
ventilation system is secured and all persons leave the space
ventilation system is kept operating
第9题:
upwards;top
upwards;bottom
downwards;top
downwards;bottom
第10题:
reduce the ring groove wear rate
seal against crankcase vapors
lessen the wear on aluminum part of the cylinder
allow for the greater expansion rate of aluminum
第11题:
Ⅰonly is correct
Ⅱ only is correct
both Ⅰ and Ⅱ are correct
neither Ⅰ or Ⅱ are correct
第12题:
Liner wear is distributed equally between the upper and lower portions of the cylinder
Excessive liner wear causes wear between piston ring and groove
Excessive, but uniform liner wear will not cause wear between piston ring and groove
Liner wear is normally greatest in the middle of the cylinder
第13题:
第14题:
第15题:
第16题:
(1) only is correct
(2) only is correct
both (1) and (2) are correct
neither (1) or (2) axe correct
第17题:
safety cap
life jacket
safety harness
clothes
第18题:
to stiffen
to soften
to loosen
to wear
第19题:
They should wear safety shoes
They should wear ear protection
They should not wear jewelry
All of the above
第20题:
Sports wear.
Holiday wear.
Summer wear.
Casual wear.
第21题:
第22题:
axe
gloves
clothes
glass
第23题:
tell us that eggs are easy to break
show how to wear a seat belt
show why it’s important to wear a seat belt in a car
tell us what a skateboard is