问题
单项选择题
孕40W，初产，宫口开全2h，胎头棘下2cm，宫缩较前减弱，胎膜已破，胎心120次/分，产妇一般情况较好。
胎头吸引器总牵引时间一般不超过
A．10min
B．15min
C．20min
D．25min
E．30min
答案
参考答案：C
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孕40W，初产，宫口开全2h，胎头棘下2cm，宫缩较前减弱，胎膜已破，胎心120次/分，产妇一般情况较好。
胎头吸引器总牵引时间一般不超过
A．10min
B．15min
C．20min
D．25min
E．30min
参考答案：C
| 97．Because Web servers are platform and application (1) , they can send or request data from legacy or external applications including databases. All replies, once converted into (2) mark-up language, can then be transmitted to a (3) . Used in this way, Intranets can (4) lower desktop support costs, easy links with legacy applications and databases and, (5) all, ease of use. |
(1)
A．pressed
B．compressed
C．compress
D．press
xC（g）+2D（g）。若经5min后反应达到平衡状态，容器内的压强变小，并知D的平均反应速率为0.2mol/（L•min）,请填写下列空白：