问题
单项选择题
诊断用超声频率一般为（）
A.2.5～5.0MHz
B.2.5～7.5MHz
C.1.0～10.0MHz
D.5.0～10.0MHz
E.5.0～7.5MHz
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
诊断用超声频率一般为（）
A.2.5～5.0MHz
B.2.5～7.5MHz
C.1.0～10.0MHz
D.5.0～10.0MHz
E.5.0～7.5MHz
参考答案：C
阅读下面短文，掌握其大意，然后从16-25各题所给的A、B、C和D项中，选出最佳选项，并在答题卡上将该项涂黑。 Most children want to be pop stars or footballers when they grow up. But 11-year-old Amy Jones had the chance to ____16____ more about her ____17____ job—a medical biologist —when she won an essay writing competition for primary students. Amy’s __18__ for the best essay on “What I want to be when I’m older” was a day at Oxford Medical Science Institute. Staff organised a special programme for the would-be __19__, introducing her to the projects being worked on by medical biologists at Oxford. The sessions included a look at the ___20___ of medical biologists in fighting cancer and ___21___ to become a medical biologist. Amy said she was ___22___ to become a biologist after watching a television programme. In her essay she wrote: “The medical biologist plays a big part in many discoveries and it would be a challenging, exciting and ___23__ job.” Dr. Kathryn Robson, the Institute director said: “ It’s ___24___that we encourage young people to study science and think about scientific research as a job. I hope Amy now has a better __25__of what it takes to become a medical biologist.”
|