【单选题】---You seemed to be impressed by his skill. ---No. It was his courage ________ his skill that really impressed me.
【判断题】锅炉司炉操作证I、II、III、IV四类,其中IV类要求最高。
【单选题】Pronouncing a language is a skill. Every normal person is expert in the skill of pronouncing his own language, but few people are even moderately proficient at pronouncing foreign languages. Now there...
A.
Only a few people are really proficient.
B.
No one is really an expert in the skill.
C.
There aren't many people who are even fairly good.
D.
There are even some people who are moderately proficient.
【单选题】Pronouncing a language is a skill. Every normal person is expert in the skill of pronouncing his own language, but few people are even moderately proficient at pronouncing foreign languages. Now there...
A.
Only a few people are really proficient.
B.
No one is really an expert in the skill.
C.
There aren't many people who are even fairly good.
D.
There are even some people who are moderately proficient.
【单选题】The IV estimator is not ideal for forecasting purpose, because
A.
the IV estimator is consistent
B.
the IV estimator is inconsistent
C.
the IV estimator usually has much larger variance than its OLS counterpart.
D.
the IV estimator requires two stages of estimation, which can be computationally inefficient under large sample sizes.