在现代通信局(站)中,一个地网应起的作用有()等。
A.防雷接地
B.保护接地
C.电气接地
D.工作接地
参考答案:A, B, D
确诊疟疾最简便而迅速的方法是:()
A.血涂片
B.血培养
C.骨髓培养
D.骨髓涂片
E.酶联免疫吸附试验
Now that you’ve gotten a little more confident, we’re going to give you the opportunity to practice "without the training wheels." When you want to check your work, you can turn to the solutions at the end. If you aren’t familiar with some of the mathematical concepts, make a note to pay particular attention to that chapter in this book; this practice set covers a wide range of topics tested on the GMAT. On all data sufficiency problems, the answer choices are the same (as you’ve learned). We’ve put them here for your reference. A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient. B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient. C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient. D. EACH statement ALONE is sufficient. E. Statements (1) and (2) TOGETHER are NOT sufficient.
What is the value of
(1)
(2) h=5g