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【单选题】
固定铰支座A的支座反力通常用( ) 表示A.
XA，YA
B.
XA，MA
C.
YA，MA
D.
XA，YA，MA
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举一反三
【单选题】According to the passage, what is the foundation of cooking delicious food? kitchen sanitation ensure food safety clean all food surfaces sanitize all food surfaces
A.
kitchen sanitation
B.
ensure food safety
C.
clean all food surfaces
D.
sanitize all food surfaces
【单选题】One area that is often overlooked in HIV care is the importance of food safety and food-borne illnesses. But for an HIV positive person, food safety is important.
A.
carried by food
B.
with the features of food
C.
ready-made food
D.
uncooked, organic food
【单选题】—Chinese people are worried about the food they eat these days. —Yes, the food safety is a serious in our country. We should try to solve it.
A.
subject
B.
program
C.
problem
D.
opinion
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