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【单选题】
在菌落数报告的，不正确的一条是（）。A.
菌落数＜100时，按实数报告
B.
菌落数＞100时，采用两位有效数，它后面的数值以4舍5入法计算，再乘以10的指数
C.
菌落数如无法计算时，应注明所测标本的稀释倍数
D.
菌落数＜10时，不报告
E.
因菌落数太多无法计算，可不报告
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【单选题】Your flight begins boarding _____ Gate 18 _____ 2:15
A.
at / at
B.
in/at
C.
from/at
D.
for/in
【单选题】听力原文：A heater is using convection when it warms the air in a room. And the air in turn warms the people and objects in the room. A hot water radiator, a stove and forced air furnace are all convection...
A.
It heats only the objects in a room.
B.
It is lighter in weight.
C.
It heats the room quicker.
D.
It is more common.
【简答题】Let me_____________(引导)you to your boarding gate.
【单选题】Which of the following is true about using air carriers as a transportation mode when shipping products?
A.
Air carriers are the most cost-effective way to ship non-perishable goods over short distances.
B.
Air carriers are the slowest and least reliable modes of transport.
C.
Air carriers provide in-transit services such as the processing of goods en route.
D.
Air carriers are ideal when time is short and speed is needed.
【单选题】Many restaurants have stopped using trans fats because they may______.
A.
pollute hydrogenated oils
B.
cause the food decay quickly
C.
raise the risk of heart attack
D.
spoil the taste of food
【简答题】The flight number and boarding gate are indicated on your tickets.
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