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【单选题】
设全集 U ＝R，集合 M ＝{ x | x >0}， N ＝{ x | x 2 ≥ x }，则下列关系中正确的是( )A.
M ∪ N ? M
B.
M ∪ N ＝R
C.
M ∩ N ∈ M
D.
(? U M )∩ N ＝?
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【简答题】蛋白激酶A(protein kinase A)
【单选题】下列属于银行一方未达账项的是( )。
A.
银行代企业收回的货款，企业尚未入账
B.
银行代企业支付的电费，企业尚未入账
C.
企业收到转账支票存银行，银行尚未入账
D.
银行收取贷款利息，企业未收到通知尚未入账
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A.
银行代企业收回的货款,企业尚未入账
B.
银行代企业支付的电费,企业尚未入账
C.
企业收到转账支票,银行尚未入账
D.
银行收取贷款利息,企业尚未入账
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