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【多选题】
贫血的临床表现相关因素有A.
发生贫血的速度
B.
贫血导致血液携氧能力下降的程度
C.
贫血时血容量下降的程度
D.
贫血的病因
E.
血液、循环、呼吸等系统对贫血的代偿和难受能力
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反馈参考答案：
举一反三
【判断题】1970年美国超级市场AdHoc委员会制定了通用商品代码——UPC码（Universal Product Code），此后许多团体也提出了各种条码符号方案。
A.
正确
B.
错误
【单选题】— Excuse me. Can you spare me a few minutes? — _____. [ ]
A.
What's on?
B.
What's more?
C.
What's up?
D.
What is it?
【单选题】―Do you have anything to do this afternoon? ―What’s up? ―Let’s go shopping. It’s said that Jinying Shop _____, and all the sweaters are sold at half price. ―Why not?
A.
has closed down
B.
was closing down
C.
closes down
D.
is closing down
【单选题】—You look so worried, what’s wrong? —More and more people like me become to worry about the __________ pollution after the haze (雾霾) appeared in Beijing and some other cities in China.
A.
water
B.
air
C.
noise
D.
Soil
【单选题】-You look so worried, what’s wrong? -More and more people like me begin to worry about the ______ pollution after the haze (雾霾) appeared in Beijing and some other cities in China.
A.
water
B.
air
C.
noise
D.
Soil
【单选题】—Excuse me，can you spare me a few minutes? —________？
A.
What's on
B.
What's up
C.
What is it
D.
What's more
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