
建筑工程实行施工总承包的,工程施工现场的安全应由()统一负责。
A、建设单位
B、监理单位
C、施工总承包单位
D、分包单位


A、建设单位
B、监理单位
C、施工总承包单位
D、分包单位
在N型半导体中,空穴是多数载流子,而自由电子是少数载流子。
Part l Reading Comprehension
Section A
Directions: In this section, there is a passage with ten blanks. You are required to select one word for each blank from a list of choices given in a word bank following the passage. Read the passage through carefully before making your choices.Each choice in the bank is identified by a letter. Please write down the corresponding letter for each item in the blanks.You may not use any of the words in the bank more than once.
Harvard was named after its fist financial supporter, John Harvard. He was a Christian clergyman from the Massachusetts Bay Colony. He left his library and half of everything else he owned to the school when he___1___ in 1638.
Harvard admitted only ___2__ for most of its history It opened an allied college for women called the Harvard Annex in 1879. This was later established as Radcliffe College. That women were ____3____ to attend Harvard classes began in the 1940s. But it was 1963 before women were officially enrolled in Harvard University and permitted to earn Harvard degrees.
Today, Harvard has about 18,00 students in ___4___ and graduate programmes. It is considered one of he best universities in the country, the richest, and the most difficult to gain ____5___. Drew Gilpin Faust is the 28th president of Harvard. She is the first female _____6____ in the university’s history.
Harvard has had many famous ____7___. Several American presidents are among them, including the current president,George Bush He graduated from Harvard's business school. A current American presidential candidate is also a former Harvard student.Senator Barack Obama graduated from its law school.
Harvard has also had its share of famous drop-outs.Bill Gates began at Harvard in 1973 and____8___ two years later without graduating.We think he did pretty well life, even ___9____ the Harvard degree, but the school gave him an _____10_____ degree last year.
A) left B) graduates C) popularity D) honourary E)without
F)men G) died H) honourable I) permitted J)admission
K) returned L) undergraduate M) teacher N)president O) with