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【单选题】
婴儿早期呼吸道、胃肠道感染的可能原因是( )A.
补体成分缺陷
B.
先天免疫缺陷
C.
皮肤黏膜的天然屏障差
D.
SlgA 功能尚未成熟
E.
呼吸道胃肠道发育不良
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参考解析：
知识点：
皮皮学刷刷变学霸
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【简答题】腿脚的防护装置如何配带?
【单选题】The largest source of bank income is _________
A.
interest on loans.
B.
interest on securities.
C.
service charges on deposit accounts.
D.
noninterest income.
【简答题】Next to coal-burning power plants,______are the second largest U.S. source of carbon dioxide pollution.
【单选题】The largest source of a bank's income is______.
A.
its portfolio of securities
B.
service charges and fees
C.
interest on deposit
D.
its portfolio of loans
【单选题】The largest source of income of a bank is through ___.
A.
lease
B.
transactions
C.
exchanges
D.
loans
【单选题】The largest source of government revenues is ________.
A.
personal income taxes
B.
indirect taxes
C.
corporate income taxes
D.
social security taxes
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