How can customers subscribe?
A．By calling a phone number
B．By registering on the website
C．By registering at a local bookstore
D．By going to the Va//ey Record offices

How can customers subscribe?A．By calling a phone numberB．By registering on the websiteC．By registering at a local bookstoreD．By going to the Va ey Record offices

A.By
B.By
C.By
D.By

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作用于β受体的抗心律失常药（）

A．普萘洛尔
B．苯妥英钠
C．利多卡因
D．维拉帕米
E．胺碘酮

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