问题
单项选择题 共用题干题
胎儿肺成熟度能帮助判断围生期胎儿是否能获得最佳生存条件。
测定羊水中胎儿肺表面活性物质的方法有多种，除外（）
A.测定卵磷脂/鞘磷脂的比值
B.泡末稳定性试验
C.荧光偏振法
D.薄层小体计数
E.ELISA双抗体夹心法
答案
参考答案：E
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胎儿肺成熟度能帮助判断围生期胎儿是否能获得最佳生存条件。
测定羊水中胎儿肺表面活性物质的方法有多种，除外（）
A.测定卵磷脂/鞘磷脂的比值
B.泡末稳定性试验
C.荧光偏振法
D.薄层小体计数
E.ELISA双抗体夹心法
参考答案：E
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| Most American families like to have a holiday__1__summer. Summer is season(季节) __2__holidays. It is very hot during the months of July and August. Children do not go to school during these __3__months. Some __4__like to stay at home during the holiday. They work in the garden, visit friends, __5__books, or __6__TV. Many families __7__their lunch to a park or somewhere far __8__the city. They like to eat where there are many trees or there is a nice lake. If they live near the sea, they often go to the beach. They can fish , swim or enjoy the sun there. America is a large country. Many families travel by ___9__or by train to see interesting places. They also travel by plane to a foreign country. Many big cities have many famous buildings, theatres, shops and other places__10__traveleres. | |||
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