【单选题】灰铸铁中的碳是以( )形式分布于金属基体中的。
【单选题】灰铸铁中的碳是以 形式分布于金属基体中。
【单选题】灰铸铁中的碳是以( )的形式分布于金属基体中。
【简答题】00是晚上12时.______.(判断对错)23:00是晚上12时.______.(判断对错)
【单选题】Which of the following best describes the relation of paragraph 2 to paragraph 1?
A.
Paragraph 2 shows how the problem discussed in paragraph 1 arose.
B.
Paragraph 2 explains how the problem presented in paragraph 1 came to be solved.
C.
Paragraph 2 provides a more technical discussion of the problem introduced in paragraph 1.
D.
Paragraph 2 shows why the problem discussed in paragraph 1 was especially important to solve.
【简答题】paragraph 1 ________.