【单选题】配制1000ml2%盐酸普鲁卡因溶液,需加多少氯化钠使成等渗(1%盐酸普鲁卡因溶液的冰点降低0.12°C)
【单选题】What does Dr. Fred Whipple mean when he says this?
A.
Halley's Comet is a mass of ice covered with dust.
B.
Halley's Comet is filled with dust.
C.
Halley's Comet is a mixture of ice and dust.
D.
The structure of comet is equal to that of any other stars.
【单选题】Dr. Mass suggests that naps should be scheduled _________________.
B.
in the late afternoons
【单选题】配制1000ml2%盐酸普鲁卡因溶液,需要加入多少克氯化钠使其成等渗(1%盐酸普鲁卡因的冰点降低值为0.12℃)
【单选题】无论企业采用何种通货膨胀会计模式,都必须遵守( )。
【单选题】以下叙述错误的是( )
A.
角膜内含有多种蛋白酶,如胶原酶、胆碱酯酶、三磷酸腺苷酶等
B.
角膜基质层酶的含量较上皮细胞和内皮细胞中高,表明基质代谢旺盛
C.
胶原纤维间隙的粘多糖有保持角膜水合状态及粘合的功能