Danny thought he ____________ hit the ball. [ ]
A. can
B. could
C. will
D. can't
答案:B
为了延长局麻药的局麻作用和减少不良反应,可加用
A.肾上腺素B.去甲肾上腺素C.异丙肾上腺素D.间羟胺E.多巴胺