某片剂标示量为100g，测得颗粒剂中主药含量50%，则每片颗粒重
A. 300rug
B. 200mg
C. 150mg
D. 100mg
E. 50mg
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How can a mother help the baby to cry less
A. Cuddle the baby until he is quiet.
B. Leave the baby alone.
C. Do not always attend to the baby.
D. Teach the baby not to cry.
From the first paragraph we know that ______.
A. mother care is the best according to a national study
B. child care outside home is the best in accordance with the study
C. regular child care outside home may play a role as a mother
D. connections between mothers and infants are damaged by outside care
磷脂酰肌醇4，5二磷酸经磷脂酶C作用后的产物是
A. 磷脂酸和二磷酸肌醇
B. 溶血磷脂酰肌醇和脂肪酸
C. 甘油二酯和三磷酸肌醇
D. 磷酸甘油、脂肪酸及二磷酸肌醇
下列有关原核生物DNA聚合酶Ⅲ的叙述错误的是
A. 它是催化复制延长的酶
B. 具有5′→3′聚合酶活性
C. 具有3′→5′外切酶活性
D. 具有5′→3′外切酶活性
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