皮皮学,免费搜题
登录
搜题
【单选题】
农药污染食品的途径包括哪些?
A.
使用农药引起的直接污染
B.
作物从环境中吸收农药残留引起的间接污染
C.
食物链生物富集引起的间接污染
D.
以上都是
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
.
..
皮皮学刷刷变学霸
举一反三
【简答题】试样: 开针 71 针,废纱单边起口 5 转, 1×1 罗纹 10 转 ,翻针成纬 平 针 20 转,废纱 5 转封口下机。以 拍照的形式交作业,并用文字分析织物的卷边性。 2. 预习:加针(暗放针)、减针、过针、手摇横机注意事项(教材 29-32 页),看学习通小视频 .
【简答题】The ____ was back. Twiga could eat the moon when he was tall. 2.His father gave him some beautiful ____ at the top of the trees. 3. Twiga knew that he could eat the beautiful fruit when he grew __. An...
【判断题】两端鞭毛的意思是在菌细胞外侧各边上都有鞭毛。
A.
正确
B.
错误
【简答题】Mozart was born 1 January 27, 1756, in Austria. When he was only three,he asked for music lessons. He could think of nothing 2 music. The child learned 3 by watching and 4 the music that was played in...
【简答题】One thorn( 刺 ) of experience is worth many times of warning. Ralph Wick was seven years old. In most things he was a fine boy, but he would cry from time to time. When he could not have what he wanted...
【单选题】浆料宜采用( )搅拌方式,搅拌时间一般为1-2min。
A.
机械
B.
人工
【简答题】SMT即表面组装技术,又称为( ),是将电子元器件直接安装在印制电路板的表面,是目前电子组装行业里最流行的一种技术和工艺。
【判断题】数据观测值与均值的偏差平方和最小
A.
正确
B.
错误
【简答题】Mozart was born 1 January 27, 1756, in Austria. When he was only three, he asked for music lessons. He could think of nothing 2 music. The child learned 3 by watching and 4 the music that was played i...
【简答题】浆料宜采用 方式,搅拌时间一般为 1-2min。
相关题目: