（1）超市里一捆折耳根的重量是0.42千克，一瓶辣椒粉标注的净含量为150克.
0.42是(有理数/无理数).
150克=千克(用分数表示),是(有理数/无理数).

(1) 有理数 $\frac{3}{20}$ 有理数

（2）某农场用正方形地块种植折耳根，地块面积为36平方米.
地块的边长是米，是（有理数/无理数）.
若面积扩大为原来的3倍，新边长是米，是（有理数/无理数）.

(2) 6米 有理数 $6\sqrt{3}$ 无理数

2 解答题.
如下图所示,在一个长为m米,宽为n米的长方形种植区域里,整齐种植着折耳根.种植区域中间有一条弯曲的灌溉水渠,水渠的左边线向右平移0.5米就是它的右边线.求种植折耳根的实际面积.

$(mn - 0.5n)$平方米

3 制作题.
制作一个圆锥形状的折耳根沥水架(无底面),沥水架母线长为12厘米,底面圆周长为$10π$厘米.
(1) 圆锥的侧面展开图是(填形状).
(2) 这个侧面展开图的弧长是,半径是.
(3) 制作出这个圆锥形状的折耳根沥水架.
1 Choose the proper word or phrase to complete the following conversation.(选择最恰当的单词或短语填入空格)
enough how many how much too little too much
Tom and Lily want to make Fish Mint Salad. They are checking whether they have enough ingredients(原料). Complete their conversation.
Required ingredients:
- Fish Mint: 300 g
- Chili oil: 20 ml
- Garlic (minced): 15 g
- Vinegar: 10 ml
Tom and Lily have:
- Fish Mint: 200 g
- Chili oil: 25 ml
- Garlic: 10 g
- Vinegar: 5 ml
Tom: Do we have (1) Fish Mint, Lily?
Lily: No, we don't. We only have 200 g.
Tom: We need to buy some more. (2) grams of Fish Mint do we need in total?
Lily: We need 300 g, so we should buy 100 g more.
Tom: (3) chili oil do we have?
Lily: We have 25 ml. That's enough. We only need 20 ml.
Tom: Do we have enough garlic?
Lily: No. We only have 10 g. We need 15 g in all. We have (4) garlic.
Tom: How about vinegar? (5) vinegar do we have?
Lily: We have 5 ml. We need 10 ml. We have (6) vinegar.
Tom: Let's go to the supermarket to buy what we need!

3 (1) 扇形
(2) $10π$厘米 12厘米
(3) 准备材料：一张足够大的硬纸板(用于制作侧面)、剪刀、胶水或胶带。
绘制扇形：根据前面计算，以一点为圆心，用圆规量取12厘米为半径画弧，再利用圆规和直尺，在弧上截取一段弧长为$10π$厘米(约31.4厘米)的弧，连接圆心与弧的两端点，得到所需扇形。
裁剪与粘贴：用剪刀剪下绘制好的扇形，将扇形的两条半径对接，用胶带粘贴起来，形成圆锥的侧面，这样就制作出了无底面的圆锥形状折耳根沥水架。
1 (1) enough
(2) How many
(3) How much
(4) too little
(5) How much
(6) too little