The demand for a good rises from 20,000 to 25,000 following a reduction in price from $20 to $18.What is the price elasticity of demand, using the average (midpoint) method? (Give your answer to 1 decimal place. Ignore a minus sign.) ____.

A business currently sells 10,000 units of its product each month at a price of $10 per unit. The product's price elasticity of demand is –0.4. Calculate the impact on the firm's total revenue per month if the price of the product is increased to $11 per unit. (Use the simple point method for calculating price elasticity of demand. Give your answer to the nearest whole number.) ____(Increase/Decrease) of $ ____.

A firm currently sells its product at a price of $8 per unit, and generates sales revenue of $7,200 per day. The firm's management team decided to increase the price of the product to $8.40 but following this increase sales revenues fell to $7,106.40 per day. What is the price elasticity of demand of the product? (Use the simple point method for calculating price elasticity of demand. Give your answer to 1 decimal place. Ignore a minus sign.) ____.

The word “syntax” literally means “arrangement” or “setting out together”.

A. 对
B. 错

In linguistics, syntax is the study of how words combine to form sentences and the rules which govern the formation of sentences.

A. 对
B. 错

Syntax studies the rules governing the way words are combined to form sentences in a language.

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B. 错

Sentences are strings of words which occur in a random order.

A. 对
B. 错

In English the subject usually precedes the verb and the direct object usually follows the verb.

A. 对
B. 错

A noun phrase must contain a noun, but other elements are optional.

A. 对
B. 错

A construction is any syntactic structure such as a sentence or phrase.

A. 对
B. 错