在同一电气回路中，当三相电流对称和三相设备相同时，比较三相电

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问题单项选择题

在同一电气回路中，当三相电流对称和三相设备相同时，比较三相电流致热型设备对应部位的温升值为（）。

A.相对温差判断法

B.表面温度判断法

C.热谱图分析法

D.同类比较法

答案

参考答案：D

阅读理解

阅读理解，判断“T”误“F”。

On New Year's Day people eat special foods for good luck.

In Spain and some Latin American (拉丁美洲) countries, people eat twelve grapes at midnight on

New Year's Eve-one grape for good luck in each month of the new year.

Chinese people eat dumplings. Some are made with a coin inside. Everyone tries to find the coin for luck

and money in the New Year. Of course they don't eat the coin.

Japanese people eat noodles on New Year's Eve and their birthdays. It may bring them good luck and

long life.

( )1. In Spain, people eat a bag of grapes for good luck in the New Year.

( )2. Chinese people like to eat roast ducks on New Year's Eve.

( )3. Everyone in China tries to eat the coins in the dumplings in the New Year.

( )4. Japanese people eat noodles on New Year's Eve.

( )5. People in different countries eat different foods for good luck.

单项选择题

在选择适合油脂蛋糕成型的模具时，由于油脂蛋糕中油脂含量较高，（），就不宜选择过大、过高的模具。

A、制品形态不稳定

B、制品不易成熟

C、制品传热率低

D、制品内部支持力太弱