简并密码子（degenerate codon)

简并性

A、Endometrium in progestational phase

B、Zona pellucida

C、Syncytiotrophoblast

D、Cytotrophoblast

A．pancreatitis

B．cholelithiasis

C．hepatitisA

D．cirrhosis

Nuclear power is a method used to generate electricity in Canada. Canada has played an important role in the development of nuclear power technology. In the 1950s, Canadian scientists developed the CADU reactor. The reactor is now used in three Canadian provinces and number of other countries. Atomic Energy of Canada Limited (AECL) established its first nuclear power station division in Toronto in 1958. their job was to create a plan for a big nuclear power station. In 1959, a nine-person team of engineers and scientists designed the first nuclear power station in Canada. Construction of the station began in 1960 at DouglasPoint on OntarioChalkRiver. By 1967, the station was producing power into the Ontario power system. In 1994, 60 percent of Ontario power came from the province ’s 20 nuclear reators. Quebec and New Brunswick are the only other provinces that use nuclear power. Other countries in the world also use the CANDU, and more are being built. AECL sold one CANDU to Argentina in 1973 and one to South Korea in 1976, where is now installing three more CANDUs, which should be running by 1999. Two more CANDU reactors are also being installed in Romania. By creating the CANDU reactor, Canadian scientists have made a significant contribution to the world nuclear technology. AECL says it is the safety features and efficient design of the CANDU that have attracted other countries to use the Canadian-made reactor.

1).Which statement is TRUE according to the passage? ( )

A、The first nuclear power station was founded in 1958.

B、In Canada, only in Quebec that nuclear power is use

C、Many people in Canada are against nuclear power.

D、Canadian scientist developed the CANDU reactor in 1950’s.

2).Which of the following does this passage discuss? ( )

A、Describe the benefits of nuclear power.

B、Describe the dangers of nuclear power.

C、The definition of nuclear power.

D、The increase of the use of nuclear power in Ontario

3).Besides Canada, which countries use the CANDU reactor? ( )

A、Argentina

B、South Korea

C、Romania

D、All of the above

4).The first nuclear power station was established in Canada in( )

A、1960

B、1658

C、1967

D、1959

5).Why is Canadian-made nuclear reactor so popular? ( )

A、Because it is cheap

B、Because it is safe

C、Because it is efficient

D、Both B and C

A、intellectually

B、physically

C、emotionally

D、psychologically

A、diet

B、injure

C、injury

D、factor