When administering first aid, avoid direct contact ______ blood and open cuts ____ your skin or _____ your mouth. A: over...on...into B: with...on...in C: with...into...in D: over...upon...on

I have warned you not to do that __________. A: over and over B: over and over again C: again and over D: again and again over

求函数$y = {{1 + \root 3 \of {{x^2}} - \sqrt {2x} } \over {\sqrt x }}$的导数$y' = $( ) A: $ {1 \over 2}{x^{ - {3 \over 2}}} + {1 \over 6}{x^{ - {5 \over 6}}}$ B: $ - {1 \over 2}{x^{ - {3 \over 2}}} + {1 \over 6}{x^{ - {5 \over 6}}}$ C: ${1 \over 2}{x^{ - {3 \over 2}}} - {1 \over 6}{x^{ - {5 \over 6}}}$ D: ${1 \over 3}{x^{ - {3 \over 2}}} - {1 \over 6}{x^{ - {5 \over 6}}}$

A dog was _______by a bus and killed. A: turned over B: knocked over C: run over D: got over

Don't hand in your papers until class______. A: is over B: was over C: are over D: will be over

函数\(y = \sin {1 \over x}\)的导数为（ ）. A: \({1 \over { { x^2}}}\sin {1 \over x}\) B: \( - {1 \over { { x^2}}}\sin {1 \over x}\) C: \( - {1 \over { { x^2}}}\cos {1 \over x}\) D: \({1 \over { { x^2}}}\cos {1 \over x}\)

We are certain that he will _____ his illness. A: come over B: go over C: get over D: give over

Some disputes among these countries are ______ by history. A: left over B: turned over C: handed over D: taken over

下列一段Python代码的运行结果是count = 2while count > 0: print('hello') count = count - 1 breakprint('over') A: hello hello over B: hello over hello over C: hello over D: hello hello over over

1.How many McDonald’s restaurants are there in the world? A: Over 30,000 B: Over 13,000 C: Over 3000 D: Over 1300