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【简答题】
已知椭圆9x 2 +16y 2 =144，焦点为F 1 、F 2 ，P是椭圆上一点，且∠F 1 PF 2 =60°，则 S △P F 1 F 2 =______．
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举一反三
【单选题】下列关于戊巴比妥钠的说法中错误的是
A.
戊巴比妥钠通过延长氯通道开放时间产生抑制作用
B.
随着戊巴比妥钠用药剂量的增加依次产生镇静、催眠、麻醉作用
C.
戊巴比妥钠具有肝药酶诱导作用
D.
戊巴比妥钠不影响快动眼睡眠时相,因此不会产生停药困难
【简答题】When it comes to success in business and success in life, there are few qualities as important as confidence. People naturally have different levels of confidence. Some have a higher level of confiden...
【简答题】Social responsibility is very important to the short-term business success.()
【简答题】Success in business depends on hard work.英译汉
【单选题】The company promised to provide（）and good pay & benefits for the right candidates.
A.
recommendation
B.
accommodation
C.
confirmation
D.
recognition
【单选题】下列关于戊巴比妥钠的说法错误的是
A.
戊巴比妥钠通过延长氯通道开发时间产生抑制作用
B.
随着戊巴比妥钠用药剂量的增加依次产生镇静、催眠、麻醉作用
C.
戊巴比妥钠具有肝药酶诱导作用
D.
戊巴比妥钠不影响REM，因此不会产生反跳现象
【简答题】When it comes to success in business and success in life, there are few qualities as important as confidence． People naturally have different levels of confidence. Some have a higher level of confiden...
【单选题】3下列有关前庭沟的描述,错误的是:
A.
口腔局部浸润麻醉常在此处穿刺
B.
前庭沟黏膜下组织致密
C.
为口腔前庭的上下界
D.
为唇颊黏膜移行于牙槽黏膜的沟槽
E.
又称唇颊龈沟
【简答题】When it comes to success in business and success in life, there are few qualities as important as confidence． People naturally have different levels of confidence．Some have a higher level of confidenc...
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