Explanation

A singleton set has only one element (e.g., {a}).

The only proper subset is the empty set (∅), so it has one proper subset.

Explanation

The goal of micro teaching is to help trainee teachers develop and refine specific teaching skills through practice and feedback.

This focused approach allows teachers to enhance particular aspects of their teaching techniques in a controlled setting.

Explanation

Sound waves are characterized by amplitude (loudness), wavelength (distance between wave peaks), and frequency (pitch).

These parameters help describe how sound behaves and is perceived.

Explanation

Present continuous active voice ("are repairing") changes to "is being repaired" in passive voice.

The subject (they) becomes the agent in the passive sentence.

Explanation

Pragmatic means practical and focused on results or real-world applications.

Such students choose courses based on usefulness and immediate benefit.

Explanation

For the multiplication of two matrices A (size m x p) and B (size p x n), the resulting matrix AB will have dimensions m x n.

The number of rows of A and the number of columns of B determine the dimensions of the product matrix.

Explanation

Present continuous uses "is/are/am + verb-ing" (e.g., "She is sleeping").

"She is sleeps" is incorrect because "sleeps" is not in -ing form.

Explanation

حروف قلقلہ کی تعداد 5 ہے۔

یہ پانچ حروف ہیں:

ق، ط، ب، ج، د

یہ حروف قرآن کی تلاوت میں خاص طریقے سے ادا کیے جاتے ہیں تاکہ آواز میں لرزش (قلقلہ) پیدا ہو۔

Explanation

"Beware" is an imperative verb used to give a warning or command.

It means "be cautious" or "be on guard", making it a verb in this sentence.

Explanation

في المصيف يكون الطل خليفاً

اس کا مطلب ہے: گرمیوں میں شبنم خنکی کا متبادل ہوتی ہے۔