在一个生物群体中，若仅考虑一对等位基因，可有多少种不同的交配类型（ ）

下列各句中，加下划线的成语使用不恰当的一项是(    )。

下图是甲醇/过氧化氢燃料电池内部结构示意图。工作时，甲醇和过氧化氢分别进入燃料电池的燃料腔和氧化剂腔，在各自催化剂的作用下发生反应，并向外界输出电能。下列说法正确的是（      ）

水龙吟·秋兴

吴则礼

    秋生泽国，无边落木，又作萧萧下。澄江过雨，凉飙吹面，黄花初把。苍鬓羁孤，粗营鸡黍，浊醪催贳①。对斜斜露脚，寒香正好，幽人去，空惊咤。

    头上纶巾醉堕，要欹眠，水云萦舍。牵衣儿女，归来欢笑，仍邀同社②。月底蓬门，一株江树，悲虫鸣夜。把茱萸细看，牛山③底事，强成沾洒。

【注释】①贳：读shì，赊欠。②社：一种民间传统节日的庆祝活动。③牛山：《晏子春秋》载，齐景公登牛山，流涕曰：“美哉国乎!若何去此而死也？”

    When I was in the middle school, I was good at many subjects ____ (除了) English. It was a little difficult for me and I often made ____ (错误) in the test. I felt very sad.

    Luckily, my English teacher Miss Li was ____（相当地）kind. She advised me to buy a dictionary and ____(提议，提出) to help me solve ____ (主要的，基础的) problems. Miss Li said that I ____(应该) speak English aloud and read ____(大量，众多) of English books. With her help, my English improved ____(迅速地,快地). It was much ____ (更简单) for me to remember the words than before. And I became one of the actresses in the school English show at ____(终于，最后).

    I was thankful to my dear English teacher, Miss Li.