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【单选题】
大环内酯类抗生素的特点不包括以下哪一点（）A.
抗菌谱窄
B.
细菌对本类各药间存在不完全交叉耐药性
C.
在酸性环境中抗菌活性较强
D.
酯化衍生物可增加口服吸收
E.
主要经胆汁排泄，进行肝肠循环
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参考解析：
知识点：
皮皮学刷刷变学霸
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【单选题】枕先露分娩机制中胎头衔接是指（ ）
A.
胎头进入骨盆上口平面
B.
胎头双顶径进入骨盆上口平面
C.
胎头颅骨最低点到达骨盆上口平面
D.
胎头枕额径进入骨盆上口平面
E.
胎头枕颏径进入骨盆上口平面
【单选题】Why did Lucky Dog talk to a shelter in Grand Bahama?
A.
because Lucky Dog wants to take dogs there
B.
because Lucky Dog wants the shelter to come help them
C.
because Lucky Dog wants to save dogs there
D.
because Lucky Dog wants to send food to the dogs there
【单选题】Why did the dog retreat to a corner and wait for the countdown of her days?
A.
The dog thought that her master wouldn't come so soon.
B.
The dog lost her hope to see her master again.
C.
The dog would rather die than live.
D.
The dog was sad because she was missing her master.
【单选题】Why did Jim Smiley ’ s little dog lose the game?
A.
Because the competing dog was too fierce to be defeated.
B.
Because the competing dog had no back legs.
C.
Because he was tired and weak.
D.
Because he quit the competition before it started.
【单选题】Why______did you take the dog into the churchyard?
A.
on earth
B.
on the earth
C.
in earth
D.
in the earth
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