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【单选题】
下列关于胃酸生理作用的叙述正确的是:A.
能激活胃蛋白酶原，提供胃蛋白酶所需的酸性环境
B.
可促进维生素B12的吸收
C.
可使食物中的蛋白质变性而易于分解
D.
盐酸进入小肠后，可促进胰液、肠液和胆汁的分泌
E.
可促进钙、铁的吸收
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皮皮学刷刷变学霸
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【简答题】请说明食品腐败变质的类型、危害及控制措施有哪些?
【简答题】欲穷千里目更上一层楼是谁写的诗句？
【单选题】The new stadium being built for the next Asian Games will be ______ the present one.
A.
three times as bigger as
B.
three times as big as
C.
as big as three times
D.
as three times big as
【单选题】In the authors opinion, the developing countries should__________.
A.
keep their present administrative procedures so as to ensure that their students return after graduation
B.
cooperate more effectively with international organizations
C.
set up more return programs under the guidance of the UN
D.
send students abroad in the fields where their knowledge is more likely to be made full use of in their own countries
【简答题】欲穷千里目更上一层楼这里说的楼是哪个楼？
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