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【单选题】
Toughened hiring standards have not been the primary cause of the present staffing shortage in public schools. The shortage of teachers is primarily caused by the fact that in recent years teachers have not experienced any improvements in working conditions and their salaries have not kept pace with salaries in other professions. Which of the following, if true, would most support the claims above?A.
Many teachers already in the profession would not have been hired under the new hiring standards.
B.
Today more teachers are entering the profession with a higher educational level than in the past.
C.
Some teachers have cited higher standards for hiring as a reason for the current staffing shortage.
D.
Many teachers have cited low pay and lack of professional freedom as reasons for their leaving the profession.
E.
Many prospective teachers have cited the new hiring standards as a reason for not entering the profession.
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【单选题】室温下 1.0×10 -4 mol•L -1 的氨水溶液 , [H + ] •[OH - ]= ( ) 。
A.
1.0×10 -10
B.
1.0×10 -4
C.
1.0×10 -14
D.
1.0×10 -8
【简答题】简述臀先露行择期剖宫产的指征。
【多选题】关于线上发货与线下发货的区别,下面描述正确的是( )。
A.
新手卖家比较适合选择线上发货
B.
量少时线上发货一样可以享受折扣，线下发货就较难享受折扣
C.
线下发货可以用美金支付宝付运费，可以提高资金的使用率
D.
线下发货直接面对发货的承运人，更加直观、安全，赔付速度更快
【单选题】室温下的 1.0×10 -4 mol·L -1 氨水溶液中, [H 3 O + ][OH - ] 等于
A.
1.0×10 -10
B.
1.0×10 -4
C.
1.0×10 -14
D.
1.0×10 -8
【单选题】室温下 1.0×10 -4 mol ∙ L -1 的氨水溶液 , [H + ] ∙ [OH - ] 等于:
A.
1.0×10 -10
B.
1.0×10 -4
C.
1.0×10 -14
D.
1.0×10 -8
【简答题】RUP模型将软件开发过程分为4个大的阶段，分别是先启、精化、（）和产品化。
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